AllocateGrok 4.3 vs Claude Sonnet 5
Grok 4.3 is not currently in the Allocate serving catalog, so this page lists no prices for it: every price on this site comes from the live catalog.
Grok 4.3
Claude Sonnet 5LabxAIAnthropic
AccessNot served on AllocateAPI only
Context windown/a1M tokens
List price, inputNot served$3 / M tokens
List price, outputNot served$15 / M tokens
Cached inputn/an/a
LicenseProprietary APIProprietary API
Fine-tunableNoNo
Specifications and provider list prices from the Allocate catalog, checked 2026-07-21.
Choose Grok 4.3 for
- Freshness-sensitive answers
- Fast reasoning turns
- Research assistants
Choose Claude Sonnet 5 for
- Judgment calls with policy context
- Customer-facing writing
- Review and escalation flows
Common questions
Which has the bigger context window?
Claude Sonnet 5: 1,000,000 tokens (1M) against an unlisted window for Grok 4.3.
Can I fine-tune Grok 4.3 or Claude Sonnet 5?
No. Both are closed models served over API. If you want a model you can train and own, start from an open-weights base in the catalog.
Related comparisons
Run the numbers on your workload
Or don’t choose. On Allocate a route name is the contract: point yours at one model today, swap to the other tomorrow, and compare them on your live traffic with per-token metering.